Polymer collapse due to pH or electric potential change monitored with MP-SPR

Application Note #136

Langmuir-blodgett


Figure 1
. Polymer layers conformational changes in different pH. PAA= poly (acrylic acid), PEDOT= poly (3,4-ethylenedioxythiophene).

Multi-Parametric Surface Plasmon resonance (MP-SPR) was utilized to follow PAA polymer brushes swelling and collapse caused by pH or electric potential change. MP-SPR with electrochemical cell was utilized to form potential change to the conductive sensor surface. Multi wavelength MP-SPR measures whole SPR curve with two different wavelength and this can be utilized to calculate deposited layer thickness (for more details see AN#128).

Recommended instrument for this application:

200_otso_small.jpg 400_KONTIO_LOGO_24012019_cropped.jpg 210_vasa_small.jpg 410A_KAURIS_instrument.jpg  220A_naali_small.jpg 420_ilves_small.jpg
200 OTSO 400 KONTIO 210A VASA  410A KAURIS  220A NAALI 420A ILVES 
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Further reading

  • If you are interested in reading more about polymers, you can see also AN#149 -  Polymer characterization using MP-SPR - Adsorption studies and layer thickness, and AN#159 about vapour induced polymer swelling.

  • Do you want to see how MP-SPR instruments work? Click here.

  • Do you want to see comparison of MP-SPR instruments? Click here.

  • Here are a few publications you can have a look at.

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